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Stucco Over High-R Foam Insulating Board InspectAPedia®  -     Exterior wall stucco application over Thermax™ foil faced insulating board: polyisocyanurate Stucco and insulating board application over masonry building walls Synthetic stucco application over high-R insulating board Solar Age Magazine Articles on Renewable Energy, Energy Savings, Construction Practices

This article discusses the choice of high-R value insulating board for use under stucco on building exteriors. Accompanying text is reprinted/adapted/excerpted with permission from Solar Age Magazine - editor Steven Bliss.

Readers should also see SIDING EIFS STUCCO and PAINT on STUCCCO, FAILURES and also may want to review POLYISOCYANURATE FOAM INSULATION. Contact us to suggest text changes and additions and, if you wish, to receive online listing and credit for that contribution.

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Stuccoing over High-R Foam Board Insulation

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This question-and-answer article about the choices of insulating foam board for use under stucco exterior finish on buildings, appears in full-text just below and quotes-from, updates, and comments an original article, (see links just above) from Solar Age Magazine and written by Steven Bliss.

Question: "In-Town Solar Condos: One Developers's Plan Book" (Solar Age, 9/83) includes mention of an exterior insulation system for masonry walls using 2-inch urethane under stucco.

I have had little success locating such a system in Phoenix that uses polyurethane and not polystyrene foam insulating board on the building exterior.

Can you supply me with information on a polyurethane insulation system or any other exterior insulation that might give me a better R-value than 2-inch polystyrene foam insulating board? - James Hoffman, Tempe, AZ.

Answer: First, a clarification - strictly speaking the rigid foam insulating board used in the La Vereda Compound (the subject of the article) was a foil-faced polyisocyanurate foam insulating board (Thermax™), not a polyurethane.

Ann MacKinnon, office manager of LaVereda developer Communico, said that The company often used Thermax™ over concrete block walls and under stucco on buildings, as do most builders in the Santa Fe area.

Wire stucco lath is placed over the foam insulating board and attached to the masonry below using concrete nails. MacKinnon said that "a builder Santa Fe who didn't know and use this technique would probably be out of business" because demand is high for adobe-like finishes. She added that lath and stucco can be used over sprayed-on urethane foam insulation as well.

Readers should also see SIDING EIFS STUCCO and also may want to review POLYISOCYANURATE FOAM INSULATION.

Here we include solar energy, solar heating, solar hot water, and related building energy efficiency improvement articles reprinted/adapted/excerpted with permission from Solar Age Magazine - editor Steven Bliss.

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SOLAR ENERGY SYSTEMS
  PASSIVE SOLAR DESIGN METHOD
  PASSIVE SOLAR ENERGY MONITORING
  PASSIVE SOLAR FLOOR TILES, PHASE CHANGE
  PASSIVE SOLAR HEAT PERFORMANCE
  PASSIVE SOLAR HOME, LOW COST
  PHOTOVOLTAIC POWER SYSTEMS
  SLAB INSULATION, PASSIVE SOLAR
  SOLAR COLLECTOR AIR or GAS COLLECTION
  SOLAR COLLECTOR EFFICIENCY COMPARISONS
  SOLAR COLLECTOR FILMS
  SOLAR COLLECTOR WOOD HOUSINGS
  SOLAR HEATING SYSTEMS
  SOLAR HOT WATER HEATERS
  SOLAR HOUSE EVALUATION
STUCCO OVER FOAM INSULATION
STUCCO PAINT FAILURES
TERMITES, ROT
  Insects & Foam Insulation
  Mold in Foam Insulation

• Solar Age Magazine was the official publication of the American Solar Energy Society. The contemporary solar energy magazine associated with the Society is Solar Today. "Established in 1954, the nonprofit American Solar Energy Society (ASES) is the nation's leading association of solar professionals & advocates. Our mission is to inspire an era of energy innovation and speed the transition to a sustainable energy economy. We advance education, research and policy. Leading for more than 50 years. ASES leads national efforts to increase the use of solar energy, energy efficiency and other sustainable technologies in the U.S. We publish the award-winning SOLAR TODAY magazine, organize and present the ASES National Solar Conference and lead the ASES National Solar Tour – the largest grassroots solar event in the world."
  
• Steven Bliss served as editorial director and co-publisher of The Journal of Light Construction for 16 years and previously as building technology editor for Progressive Builder and Solar Age magazines. He worked in the building trades as a carpenter and design/build contractor for more than ten years and holds a masters degree from the Harvard Graduate School of Education. Excerpts from his recent book, Best Practices Guide to Residential Construction, Wiley (November 18, 2005) ISBN-10: 0471648361, ISBN-13: 978-0471648369, appear throughout this website, with permission and courtesy of Wiley & Sons. Best Practices Guide is available from the publisher, J. Wiley & Sons, and also at Amazon.com.
  Excerpts with updates and annotations expanding the original Best Practices Guide text can be found in the online review and book summary at BEST CONSTRUCTION PRACTICES GUIDE and also at DECK & PORCH CONSTRUCTION, at INDOOR AIR QUALITY IMPROVEMENT GUIDE, and in other articles found at InspectAPedia.com such as HOUSEWRAP AIR & VAPOR BARRIERS, SOUND CONTROL in BUILDINGS, and other topics.
• PAINT on STUCCCO, FAILURES - discusses cause, cure, and prevention of paint failures on synthetic exterior stucco on buildings

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